It is only when an NBA player has aged and been through many battles ______ he learns an

important lesson; there is no “I” in “team”．

A．after

B．before

C．what

D．that

红细胞分化、成熟障碍所造成的贫血不包括（）

A.地中海贫血

B.遗传性球形细胞增多症

C.再生障碍性贫血

D.巨幼细胞性贫血

E.缺铁性贫血